My system is not decent

Chapter 957 Cobalt Spinel
Back in the cabin, Chen Wenzhe didn't show any politeness, and directly picked a big blue gemstone to look at.

He only took a short look, and found that the crystals inside were arranged very regularly, and it was definitely not sapphire.

Because the crystals inside the sapphire are not so regular, even a little messy.

"Spinel?" Soon, Chen Wenzhe thought of what it was. After all, there are only a few kinds of gemstones in the world, so it's not difficult to guess.

Blue spinel has two blue varieties, ferromagnesian spinel and zinc spinel, ranging in color from light blue to dark blue.

As a gem variety, they are collectively referred to as blue spinel.

In contrast, blue spinel is far less famous and valued than red spinel.

In terms of appearance, the best quality blue spinel is similar to some sapphires in bright blue or light purple blue, and its luster and transparency are also very attractive, but it is rare.

Most blue spinels are a deep, dark blue that tends toward smoky gray, even with purple tinges.

Its luster and transparency always have a dull, blurred feeling.

To lighten the color properly, blue spinel is often worked fairly thin.

Like sapphire, its cut is generally oval mixed with facets.

Of course, this does not mean that all blue spinels are bad, bad, or of little value.

On the contrary, among the blue spinels, there are really some treasures.

For example, a small number of blue spinels have cat's eye effect and starlight effect (radiant starlight).

A good-quality blue spinel, at first glance, is indistinguishable from a sapphire of the same color.

However, blue spinel is single refraction and has no pleochroism, while sapphire may have obvious pleochroism.

However, the lack of pleochroism for light blue sapphires makes them indistinguishable from blue spinels.

However, the relative density of the two is significantly different, and the refractive index is also different, which makes it easy to distinguish them.

As for the deep and dark blue spinel, because it always gives people a dull and vague feeling, the price is not high.

Also, this feeling is quite special, and experienced people can recognize it based on this feeling.

Obviously, the blue spinel in front of Chen Wenzhe's eyes is not a good thing, because the color is not good.

At this moment, Chen Wenzhe was already very disappointed. What he wanted were good things, treasures with collectible value, not these rags.

Chen Wenzhe knew that maybe he was too greedy, because blue spinel is mainly produced in the gem gravel layer of Sri Lanka, and a small amount is also produced in Myanmar.

South Vietnam?Chen Wenzhe's mind is a bit out of place!
Don't tell me, Chen Wenzhe suddenly remembered that Nanyue really produced a top-quality blue spinel.

With an idea, Chen Wenzhe sank his mind and once again distinguished the gems on the table.

He noticed just now that these gemstones are of different qualities, and some of the beautiful ones are even synthetic gemstones.

Of course, there are also some valuable gemstones, which need to be carefully identified by him.

Some of the bad colors are all picked out.

Rare, finely colored blue spinel, comparable in value to red spinel.

And the common blue spinel, which is dull in color, has very low value.

This, whether natural or synthetic, is of little value.

Look at those beautiful colors, but after lighting, there is red fluorescence, this is a composite.

Like synthetic ruby, dark blue synthetic spinel, was one of the first synthetic gemstones to be created in the early 20th century.

Before the success of synthetic sapphire, blue synthetic spinel was colored by the addition of cobalt.

The color-causing elements of natural sapphire are titanium and iron, which are completely different from this.

Therefore, this synthetic spinel will emit a peculiar faint red fluorescence that cannot be seen in any other gemstones under strong tungsten light, which is a valuable identification mark.

Of course, blue synthetic spinel is not used to imitate natural spinel, but to imitate sapphire, which is of much higher value.

For example, the light blue and light blue-green synthetic spinels in Chen Wenzhe's hands are often used to imitate aquamarine, that is, sapphire.

But the color of both is different from the soft light blue of aquamarine.

A light blue synthetic spinel that will appear with a purplish tinge against a white background.

The light blue-green synthetic spinel has a cooler hue and appears greener in strong light.

This batch of gems is not good, Chen Wenzhe is very sure of this.

However, the natural spinels inside still aroused his interest.

However, these natural spinels are of low value.

And those beautiful spinels are synthetic things, not to mention worthless.

Needless to say, the little boy sitting not far away has no kindness at all.

He was afraid that from the very beginning, he wanted to use this batch of things to deceive him.

It's just that this guy doesn't know that there are still some natural spinels in it, which are of some value.

The most important thing is that the color should be cobalt ore, not iron, zinc, titanium and other elements.

If it is the color of cobalt, that is to say, because it contains cobalt ore, the spinel turns blue. Such spinel is called cobalt spinel.

Chen Wenzhe knows that there is a top blue spinel in South Vietnam, which is cobalt spinel!

Cobalt spinel is a blue spinel colored by cobalt.

However, not all blue spinels are cobalt spinels.

Some iron-zinc colored spinels can be gray-blue to dark-blue in color.

Cobalt spinel is a relatively rare and expensive variety of spinel.

In recent years, cobalt spinel has attracted more attention in the gem market, and the price of blue spinel at auction has also risen.

Myanmar, Sri Lanka, Tanzania, South Vietnam and other countries all produce cobalt spinel.

However, many cobalt spinels on the market come from Sri Lanka, and not many people know that South Vietnam also produces this gemstone.

Not many people know, does not mean that everyone does not know.

You should know that Nanyue cobalt spinel is bright in color. Although most of the cobalt spinel produced are petite and rare, they are of high quality and the most expensive.

From the large pile of blue spinel in front of him, Chen Wenzhe saw the characteristics of the cobalt spinel produced in South Vietnam.

It's just that these are some ordinary goods, and the main color-causing element of this ordinary blue spinel is iron, and the blue spinel colored by iron has a gray tone.

The difference is cobalt spinel, which is composed of a small amount of iron and cobalt elements, interacting within a certain ratio range, thus presenting a bright cobalt blue.

The amount of cobalt element determines the blue concentration in spinel.

The concentration of blue ultimately determines the beauty and value of the spinel appearance.

(End of this chapter)